Mandrel core cutting, loading, and ejecting mechanism



May 15, 1951 a. M. KWI K MANDREL CORE CUTTI LOADING, AND EJECTINGMECHANISM 3 Sheets-Sheet 1 Filed April 18, 1949 y 1951 G. M. KWlTEK2,553,052 mam com-z CUTTING, Lemme,

AND EJECTING MECHANISM V EN TOR.

ATTORNEIG.

y 15, 1951 G. M. KWITEK 2,553,052

MANDREL CORE CUTT ING, LOADING, AND EJECTING MECHANISM Filed April 18,1949 3 Sheets-Sheet 3 ATTORNEYS.

Patented May 15, 1951 UNITED STATES MANDREL CORE CUTTING, LOADING, ANDEJECTING MECHANISM Application April 18, 1949, Serial N 0. 88,132

10 Claims. 1

My invention relates to an improved mechanism adapted to receive amandrel carrying a unitary paper tube and automatically operable to cutthe tube and wind a plurality of webs of paper or the like thereon. Thisinvention is an improvementupon my pending patent application S. N;22,485, filed April 21, 1948, now Patent No. 2,512,900, granted June 27,1950, and upon my patent No. 2,237,759 granted April 8, 1941.

In the operation of the machines described in the. above application andpatent, paper core sections are fed separately to a mandrel by theoperator. The operator thereupon places the mandrel. on the machine. forwinding. f'his is a time consuming and difficult manual operationbecause the mandrel with its paper core on it must bemanually placed inthe winding arbor.

It is a general object of the present invention to provide an improvedpaper winding mechanism capable of receiving a mandrel received in aunitary tube or core.

Another object of the present invention is to provide an improvedmechanism to cut rolls of paper or like material.

Yet another object of the present invention is to provide an improvedmechanism to feed mandrels automatically to a mandrel carrying spider.

It is further an object of the present invention to provide a corecutting, feeding, loading and discharging structure that may readily beinterconnected with the operating elements of a paper winding machine.

It is yet another object of the present invention to provide an improvedmechanism to pick up mandrels on a spider and to discharge the sametherefrom.

The novel features which I believe to be char-- acteristic of myinvention are set forth with paticularity in the appended claims. Myinvention itself, however, both as to its organization and method ofoperation can best be understood by reference to the followingdescription taken in connection with the accompanying drawing in whicFigure 1 is a somewhat diagrammatic view of a complete paper windingmachine incorporating the features of the present invention;

Figure 2 is a view of the core cutting portion of the mechanism of Fiure 1 in the discharging Figures 4 and 5 are enlarged fragmentary viewsthrough axes 1- 1 and. 55, Figure 1, respectively;

Figure 6 is a view in perspective of the cam track as seen fromunderneath and to one side;

Figure 7 is a fragmentary top plan view of the core cutting discs ofFigure 1;

Figure 8 is a somewhat diagrammatic View of the mandrel drive mechanismof the machine of Figure 1;

Figures 9, 10, 11 and 12. are views of various mandrel and chuck endsections that may be used with the mechanism of Figure 1; and,

Figure 13 is a fragmentary developed View of cam track '18, Figure 1.

Referring now to Figure 1, the paper winding machine receives paper in awide strip or web from: the feed roll B. This roll is suitably supportedby means not shown and is free to rotate to release its contents. Theweb W unrolling from roll R travels over the idler or guide roller 20 tobe fed upon the bed roll 22. Roller 20 is held in snug engagement withbed roll 22 by means not shown to assure a positive drive of the web inaccord with the rotations of bed roll 22.

The web W is wrapped around bed roll 22 from point 22a where it isreceived thereon to point 2% where it is released therefrom.

The bed roll 22 is provided with a plurality of longitudinal notches 22cspaced by the length of the sheets to be formed. Each notch is adaptedto receive a knife 2% on perforating roller 24 to perforate web l/V a itrides on the bed roll 22. Roller 24 is driven in synchronism with thebed roll 22 to assure accurate indexing of the knives 26a and thenotches 220 of bed roll 22.

After travelling past the perforator roller 24, web W is carried pastlongitudinal slitter 25. This slitter has a plurality of disk knives2611. which bear against the web and cut the same lengthwise to formstrips of the width desired to be wound. In forming toilet tissue, forexample, the knives 26a may be spaced about 4%; inches and the web W maybe about inches in length.

Vlhen the web W leaves bed roll 22 it travels to the mandrel 28 that isin the winding position on spider 32. This mandrel is driven by meansdescribed hereafter to wind the web to form the separate. rolls ofpaper. As will be described hereafter, each mandrel receives a tube orcore of cardboard that is cut to define sections to receive each stripof the web W and is in registry therewith.

When the mandrel 28 has received its full number of sheets of web, theknife 32 on bed roll 22 is extended and cuts the web. Thereafter themandrel 28 and the rolls formed thereon are carried to the discharge orupper position of the spider 3i} and are released to roll down thedischarge track A plurality of mandrel carrying completely wound coresare shown on the discharge track at 36.

The spider 39 is carried by spaced arms 48 which are swingably supportedfrom the shaft 46. The spider and arm assembly is rocked in accord withthe spider rotations by the cam 260. Rollers (not shown) on the ends ofthe spider 353 at each mandrel receiving position ride on the cam 29% toimpart this movement to the spider.

Mandrels 28 are fed to the spider 39 from the sloping feed track 38. Themandrels are each placed manually inside of a cardboard tube or core 28abefore being placed on track 38. They are singly discharged from track38 and are received in the core cutting mechanism indicated generally at48. Thereafter, the mandrels are discharged to the parallelogramtrack-defining linkages 62 from which they are picked up by the pider35.

The drive mechanism The mechanical drive for the machine is taken frommain drive shaft M. This shaft is located above bed roll 22 and isdriven by suitable means such a an electric motor (not shown).

The bed roll 22 is driven from shaft 44 by the pinion gear 45, Figure 8,which meshes with the teeth 23 formed on one side of the bed roll 22.Bed roll 22 is accordingly driven in fixed relation to the rotations ofthe main drive shaft M.

The spider 38 i continuously rotated by drive shaft 44 through shaft 45,by means not shown. The shaft Q6 is coincidental with the point ofpivotal support of the hanger or arm 48 which carries the spider 3iShaft ii: drives spider 30 by means of a belt or similar driveconnection (not shown). Shaft 46 is in turn driven from drive shaft 54by a drive connection having a suitable step down ratio so that spider39 rotates one-fifth of a revolution while bed roll 22 releases thepaper to be contained on each roll.

The driving connection between shaft 44 and spider 36 is so arrangedthat shaft 46 executes one revolution while bed roll 22 releases thepaper desired to be contained on each roll. A to 1 step down is providedin the drive connection between shaft 45 and spider 3B.

The perforator roll 24 is driven from shaft 44 to have peripheralvelocity equal to the peripheral velocity of that shaft.

The knife 32 is mounted on spring 3! to be biased outwardly and cut theweb W. However, this knife is held in a retracted position against thespring bias by arm 320. which rides on a stationary cam 33 that normallyholds the knife in the retracted position. The cam has a shiftablesegment 3 3a that is shifted out of position when the quantity of paperdesired to be rolled has been carried by bed roll 22. When this takesplace, the knife 32 is released at approximately the point 221) to cutthe web W. Winding rotations are imparted to mandrel 28 by the drivechuck 59, Figure 5. This chuck is splined or otherwise attached to theshaft 52 which receives the clutch plate 55. Clutch plate 5 5 receives afelt-like facing material 5 in which bears against the annular side faceof the drive pulley 56.

A drive chuck 59 and the associated clutch mechanism and pulley isprovided for each of the five mandrel receiving positions on the spider3t, 7 I The drive arrangement for pulleys 58 can best be understood byreference to Figure 8 which d shows the spider 3c in the position wherewinding is about to be transferred from mandrel 28a to mandrel 2837. Asshown, the main drive shaft it carries the drive pulley Ma that receivesbelt 53 having a V-shape on its opposite sides so that it can receive aV-pulley on either side. From pulley Ma, belt 58 traverses idler pulley60 and then travels over the drive pulleys 56a and 55b for mandrels 28aand 28b, respectively. Thereafter, the belt 58 travels over idlerpulleys B2 and E i to return to the drive pulley a.

The size of pulleys Ma. and 56a and 561) are so related that when themandrels are unloaded the peripheral velocity of the core slightlyexceeds the linear velocity of the web. This causes the web to windtightly. As the roll builds up and the peripheral velocity of the rolltends to increase by reason of the constant angular velocity of thedrive pulleys, the clutch facing 54a, Figure 5, slips relative to pulley56 or to plate 54 to present breakage of the web W While maintaining ittaut.

It will be observed that the mandrels are driven only when they are inthe web-receiving position. At all other times they are free to rotate.If desired, however, brake means (not shown) may be provided to arrestrotation of the mandrels after they are loaded.

M andrel pickup and release Mandrels are automatically picked up andreleased as the spider 39 rotates. This is achieved by retracting themandrel-receiving chucks in the regions adjacent the points of mandrelpickup and release.

The structure of the mandrel-holding chucks will be evident from theviews of Figures 4 and 5. As shown, the chucks 5!! and 66 have flanges50a and 56a on their forward ends and have mandrel receiving notches 56band 66b. The latter are in registry with each other to support a mandrelin axial alignment with the axis of rotation of the spider 30.

Chuck E8 is slidingly received in the hollow shaft or cup 53 which is inturn supported on spaced bearings 10. A spring 12 is received in therecess of shaft 68 to bias chuck 66 to the extended or mandrel-engagingposition. If desired, chuck 56 may be spined to shaft 68 to avoid anytendency to wind or unwind spring 12.

Chuck 5%! is similarly received in the hollow end of a shaft 52. Spring14 is received in the hollow end of shaft 52 and bottoms against thatshaft and the chuck 59 to urge the latter to the extended ormandrel-engaging position.

When a mandrel 28 is received between chucks 66 and 58 and they are freeto assume their extended positions, the mandrel is securely held inplace on spider 5t and rotates in accord with the rotations imparted tochuck 50.

When the mandrels are picked up from track 42 chucks 55 and 50 areretracted against the bias of their respective springs to permit thechucks to swing to a position in registry with the incoming mandrel.This is accomplished by the cam track defining portions l6 and T8 of thecam track it. Cam track 15 constitutes the cylindrical rim on the disk80.

As seen best in Figures 5 and 6, the edge of cam track '55 is turnedinwardly to overhang towards the center of spider 30 and to extendinwardly to engage the rockable pick-up hooks or hook-like arms 82. Asshown in Figure 5, the inturned portion 26a. of the cam track H5 engagesthe rockable hpoks 82 which in turn bottom against the flange portions50a and 66a of the chucks 5G and 6G to overcome the bias of the springs.15 and "I2 and retract the chucks.

Movements of the hooks 82 in response to the bias of springs M and '52are limited by the stop members 82b and 30a.

The cam tracks it are positioned on opposite ends of the spider 3?) inthe region adjacent discharge track 3d. The inturned portions of thesetracks, 75a, Figure 6, are made of suflicient size to retract chucks 6tand 50 to spaced positions relative to the mandrel 28 and release themandrel to track 34. The mandrel thereafter rolls down discharge track34.

The cam tracks I8 are mounted on opposite sides of spider 33 adjacentparallelogram tracks 42. These tracks have inturned portions 18a, Figure13, of sufficient size to retract chucks 66 and 5%) to spaced positionsrelative to the mandrel 28 carried by track 42.

As the spider 39 rotates, the hook 82a adjacent track 42 engages themandrel 23 on that track and pushes it forwardly. The cam track it thenreleases the chucks hit and 68 to grasp the mandrel and thereafter carrythe mandrel. Figure 3.3 is a developed view of cam track 78, Figure 1,showing how thattrack first retracts chucks 5L and 66 to travel toaligned positions relative to the mandrel without interference (portion15b of the track) and then releases the chucks engage the mandrel(portion (So of the track).

Core cutting The cutting mechanism it cuts the cores Eta on the mandrels28 to form a plurality of sections therefrom. This mechanism comprises apair of complementary cutters 8d and 85 defining gered cutting disks orknives as shown in Figure 7. Cutters 84 and 86 are carried by a commonrockable carriage defined by the shaft 88 and the cranks 98 and Q2pinned. or keyed thereto.

Cutters 8d and 3-5 are mounted on the freely rockable arms 94 and 95,respectively. Springs 518 and Hill are interposed between arms $54 and96 and the cranks 9i and 52 to cause the former to follow the rockingmovements of shaft 88 while at the same time permitting relative closingmovement of the cutters 8t and 86 as the cores 23a are out.

A drive roll I 82 is positioned in alignment with the cutters 84 and 86when the carriage defined by shaft 38 is in the intermediate positionshown in Figure 1. This roll is driven by motor it through belt I 86.

Rockable trigger I08 is located on the end of track 38 as shown inFigure 1. This trigger defines member 5880. which engages the mandrels28' to hold the same against movement.

The trigger B68 is connected to the shaft 83 by the link H3 and thecrank I22 to cause the trigger to partake of the rocking motions of theshaft 88 and the carriage defined thereby.

When the shaft 83 is rotated in the counterclockwise direction to causecutters 8d and 8a? to face track 38, the trigger 508 is rotated to theretracted position shown in Figure This releases the last mandrel 28 andpermits that inandrel to roll onto cutters as and 8%. When the carriagedefined by shaft 88 is subsequently re stored to the intermediateposition shown in Figure 1, the mandrel is carried in the nip betwee'these cutters and the core 28a out.

The mandrel 28' is discharged from cutter mechanism 40 by clockwiserocking movements of the carriage defined by shaft 38 as shown in Figure2. This releases the mandrel to roll off on the. track defined byparallelogram linkages. 42. The cutting mechanism is actuated inresponse to the needs of spider 30 by the linkage that can be tracedfrom cam I26, through cam follower and crank arm I28, link I36, crank532, link it i, and crank I36 which is keyed to shaft 88. The cam I25 isafiixed to shaft at and makes one rotation in the time period requiredto wind paper on a mandrel. Consequently, a new mandrel is to be fed foreach rotation of that cam.

Cam I26 rotates in the counterclockwise direction. As it rotates fromthe position shown in Figure l, the follower E23, which is spring biaseddownwardly, rides into dip l2iia to rock the shaft 88 to the position ofFigure 2 and release a mandrel to track I It as shown. Thereafter, thecam follower I28 rides over projection I261) to rock the carriagedefined by shaft 83 to the position of Figure 3 where a new mandrel ispicked up. Thereafter the follower 52d rides on the intermediate portionof the cam I26 where it holds the carriage defined by shaft 88 in theintermediate position. The carriage dwells in this position for theremainder of the time available before a new mandrel is required byspider 33.

M andrel feed The parallelogram linkages i2 feed the mandrels singly tothe spider 33. These linkages are located on opposite ends of the spiderto define a track capable of receiving the mandrels.

The upper rails or links I it of the parallogram linkages 42 are fixedlysupported and extend from the cutter mechanism 49 to the pickup point ofspider 3% The links H6 and iii). are pinned to these rails and areconnected at their lower ends by the lower link I26 to define aparallogram. A compression spring I22 bottoms at its opposite endsagainst link H18 and projection H5 formed on link i It to urge theparallogram linkage to the rectangular shape.

The parallogram linkage t2 normally assumes a nearly rectangular shapeas shown in Figure 3. In this condition it restrains the mandrels 28 byreason of the extended portions l the and I $312 of the links Il=6 andH8, respectiveiy. However, when the hooks 82 engage the mandrel held bylink H8, the bias of spring I22 is overcome and the whole linkagecollapsed as shown in Figure 2. This releases the mandrels to move ontrack i i, the first mandrel being picked up by the spider 38 and theother mandrels each advancing position.

Each mandrel 28 travels over glue roller i313 to receive a spot of glueto grip the web W when that web is subsequently cut by knife 32.

As shown in Figuresv 9, 10, 11, and 12, the ends of the chucks andmandrels may be of square, octagonal, or other non-circular matingshapes. Figures 9 and 11 are fragmentary axial crosssectional views ofthe chucks and Figures 10 and 12 are end elevational views of thecorresponding mandrels, respectively.

It is desirable to use hollow mandrels 28 and to harden the portionsthereof adjacent the points of contact of cutting knives 8a and B6 toachieve maximum mandrel life. This hardening may be accomplished byinduction heating and appropriate quenching.

As shown in Figure 6, member has a window to receive the belt 58.

While I have shown and described a particular embodiment. of myinvention it will be understood that I do not wish to be limited theretobut intend by the appended claims to cover all modifications andalternative constructions falling within the true spirit and scope of myinvention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

1. A mechanism for use with a machine havin a rotatable spider adaptedto receive mandrels each carrying an array of cores, said spider beingof the type adapted to receive an additional mandrel each time it isrotated a predetermined distance, said mechanism comprising meansadapted to receive a plurality of mandrels each carrying a unitary core,trigger means interconnected with said spider and adapted to release onemandrel from said means each time said spider is rotated said distance,and means to feed said mandrel to said spider, said last means includingelements adapted to cut the core on said mandrel to form an array ofcores to be received on said spider.

2. A mechanism for use with a machine having a rotatable spider adaptedto receive mandrels each carrying an array of cores, said spider beingof the type adapted to receive an additional mandrel each time it isrotated a predetermined distance, said mechanism comprising meansadapted to receive a plurality of mandrels each carrying a unitary core,trigger means interconnected with said spider adapted to release onemandrel from said means each time said spider is rotated said distance,and means operable in synchronism with said spider adapted to receivesaid mandrels as they are released and cut the cores on the same to forman array of cores to be received by said spider, and feedingmeansoperable in sequence with said last means to transfer the cut cores tosaid spider.

3. A cutting mechanism adapted to cut a core of paper or the like toform a plurality of sections, said mechanism comprising complementarycutting disks mounted on a rockable carriage, spring means interposedbetween each of said disks and said carriage and operable to urge saiddisks towards each other, and a drive roller in alignment with saidcutting disks when said carriage is in an intermediate position andadapted to bear against the core on said disks to urge it against saidcutting disks.

4. A cutting mechanism adapted to cut cores of paper or the like to forma plurality of sections, said mechanism comprising complementary cuttingdisks mounted on a rockable carriage, a drive roller in alignment withsaid cutting disks when said carriage is in an intermediate position andadapted to bear against the mandrel on said disks, a track extending toproximity with said carriage, and trigger elements operable to releasecores singly to said cutting disks when said carriage is tilted towardssaid track.

5. A cutting mechanism adapted to cut cores of paper or the like to forma plurality of sections, said mechanism comprising a pair ofcomplementarycutting disks mounted on a rockable carriage, a driveroller in alignment with said cutting disks when said carriage is in anintermediate position and adapted to bear against the core on saidrollers, tracks extending to proximity with said carriage on oppositesides thereof, and trigger elements operable to re lease cores singly tosaid cutting disks when said carriage is tilted towards one of saidtracks.

6. A mechanism to cut cores of paper or the like and discharge them toa. predetermined point, said mechanism comprising a pair ofcomplementary cutting disks mounted on a rockable carriage, trackssloping downwardly towards and away from said carriage and on oppositesides thereof, a drive roller mounted in registry with said cuttingdisks when said carriage is in intermediate position, a trigger on thetrack sloping towards said carriage adapted to restrain movement of saidcores from said track to said carriage, and'elements interconnectingsaid carriage and said trigger to actuate said rigger when said carriageis rocked to tilt towards said track.

7. A mechanism to cut cores of paper or the like and discharge them to apredetermined point, said mechanism comprising a pair of complementarycutting disks mounted on a rockable carriage, tracks sloping downwardlytowards and away from said carriage and on opposite sides thereof, adrive roller mounted in registry withisaid cutting disks when saidcarriage is in intermediate position, a trigger on the track slopingtowards said carriage adapted to restrain movement of said cores fromsaid track to said carriage, and elements interconnecting said carriageand said trigger to actuate said trigger when saidcarriage is rocked totilt towards said track, and means operable in sequence to tilt saidcarriage towards said track sloping towards said carriage, rock saidcarriage to said intermediate position, and tilt said carriage towardsthe other of said tracks.

8. A guide track and trigger mechanism to release mandrels singly to arotatable spider comprising a pair of spaced parallelogram linkageshaving their upper links oriented to define rails extending to themandrel pickup point of said spider, the transverse links extendingabove said upper links to define triggers, and means operable tocollapse said links as the mandrel-receiving point on said spider passessaid links.

9. A guide track and trigger mechanism to release mandrels singly to arotatable spider mounted on a swingable arm of the type that executes afull swing each cycle of operation, comprising a pair of spacedparallelogram linkages having their upper links oriented to define railsextending to the mandrel pickup point of arms and adapted to carrymandrels, said elements being engageable by said arms, and stationarycams operable to engage said arms to rock said arms in direction toretract said chuck elements to receive or discharge mandrels.

GEORGE M. KWITEK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,765,208 Cunningham July 17,1930 1,966,525 Schultz et al. July '17, 1934 2,366,999 Campbell Jan. 9,1945 2,385,692 Corbin et a1. Sept. 25, 1945

